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A Method of Splitting Power System into Multiple Subsystems

A power system and subsystem technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as large calculation amount and large calculation amount

Inactive Publication Date: 2011-12-14
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

This method is basically based on an exhaustive search idea. When the scale and structure of the network are relatively large and complex, the amount of calculation is still too large.
The common disadvantage of the solution strategy based on slow cohomology theory is that the calculation amount may be too large due to the need to calculate the eigenvalues ​​and eigenvectors

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  • A Method of Splitting Power System into Multiple Subsystems
  • A Method of Splitting Power System into Multiple Subsystems
  • A Method of Splitting Power System into Multiple Subsystems

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Embodiment Construction

[0092] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0093]In order to provide a practical and effective decoupling method, under the premise of realizing the safe operation of each subsystem after decoupling, the total load of the safe power supply of each subsystem is the largest, the embodiment of the present invention provides a method for decoupling the power system into multiple subsystems , see the description below:

[0094] 101: Divide the power system split model into a first power sub-model and a second power sub-model;

[0095] Among them, the optimization problem represented by formula (1) is a large-scale nonlinear mixed integer programming problem. So far, there is no very effective solution method, and the optimal solution cannot be obtained in a short time. The embodime...

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Abstract

The invention discloses a method for islanding an electric power system into a plurality of subsystems. The method comprises the following steps: dividing an electric power system islanding model into a first electric power submodel and a second electric power submodel; for the two submodels, using a staging solving strategy which is searching+adjusting: a first stage: searching the first electric power submodel based on a knapsack problem restrained by a connected graph so as to acquire each isolated subsystem; a second stage: carrying out optimization and adjustment to the each isolated subsystem based on the second electric power submodel. According to the each subsystem obtained through the islanding method, specific coherent generator groups are in the same subsystem, the subsystems are connected, voltages of the each isolated subsystem and an equipment capacity constraint are all in a bound, and a total load of safe power supply of the each isolated subsystem is greatest. Because of employing a decomposition solving strategy, a calculating speed can be accepted by engineering by using the islanding method.

Description

technical field [0001] The invention relates to a smart grid, in particular to a method for splitting a power system into multiple subsystems. Background technique [0002] The collapse of the cross-regional interconnection power system will cause great losses. If the active decommissioning strategy is adopted to divide the power system into several independently operating subsystems before the power system collapses, it can effectively prevent the spread of faults and cause power outages in large areas. [0003] In the prior art, the total load of the safe power supply of each subsystem is usually maximized as the goal, and a power system decoupling model for the optimal decoupling section selection problem of dividing the power system into subsystems is established. The power system decoupling model is as follows ( 1) as shown. [0004] [0005] Assume that the power system includes n nodes, z branches, t generators, and s coherent clusters, and nodes 1~t are generator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 林济铿吴鹏李胜文王旭东
Owner TIANJIN UNIV
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